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(EX/D1-5) Power Exhaust and Edge Control in Steady State Tore Supra Plasma

R. Mitteau¹⁾, D. Guilhem¹⁾, J.C. Vallet¹⁾, M. Chantant¹⁾, P. Chappuis¹⁾, J.J. Cordier¹⁾, A. Durocher¹⁾, F. Escourbiac¹⁾, P. Garin¹⁾, P. Ghendrih¹⁾, A. Grosman¹⁾, M. Lipa¹⁾, T. Loarer¹⁾, R. Reichle¹⁾, J. Schlosser¹⁾, E. Tsitrone^1)
 
1) Commissariat a l'Energie Atomique, Saint Paul les Durances, France

Abstract.  Tore Supra is operated since 2001 with a flat limiter which is designed for 10 MW/m². The limiter is located in the bottom of the vacuum vessel. It was only partial in 2001, but it is now fully toroidal without poloidal leading edges. Part of the experimental campaign of 2001 was devoted to the physical as well as technological qualification of the limiter. For 4 MW injected, the limiter extracted 2.5 MW and heat flux densities reached 2.5 MW/m². It is still modest compared to the design value, but nonetheless enables a comparison to the modelling as surface temperature increased locally to 400°C. Thermal steady state is reached in 5-8 seconds. The values of heat flux and the deposition pattern are in very good accordance with design simulations. The heat flux pattern is a combination of parallel and perpendicular flow components which are roughly of equal magnitude. Insights on the heat flux deposition pattern as well as on the tiles behaviour are given. Operation with such a large size high heat flux component sets an renewed emphasis on issues such as feed back systems, active security, cooling parameter and in situ assessment of the elements. They are dealt with in the paper.

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